And while he didn't want to fearmonger, Cramer pointed out that positive streaks like this are highly unusual, even though economic factors including inflation, growth and earnings are generally in the market's favor.

"I'm urging you: first, don't get cocky. Second, don't load up on leverage. Don't use margin. Third, don't speculate with more than 10 percent of your money. That's fine, 10 percent. Fourth, have a diversified portfolio. And fifth, please don't feel guilty about taking profits while you still have them," Cramer said. "No one ever got hurt taking a profit."

With that in mind, here are the stocks and events Cramer will watch this week:

Monday: Eurozone

Cramer said investors should pay close attention to Monday's Eurozone inflation report.

U.S. markets have been taking their cue from Europe lately, and if inflation overseas ticks up, as Cramer expects it will, that should bring good tidings for U.S. companies.

If inflation in Europe is higher, that could spur the European Central Bank to raise interest rates. That in turn would make the U.S. dollar even weaker, which would translate into better earnings for U.S.-based companies, particularly in the industrial sector, Cramer said.

Tuesday: Autozone, Bed Bath & Beyond, FedEx

Autozone: Cramer expects positive news from Autozone's earnings report given the increased demand for auto parts and accessories after Hurricanes Harvey and Irma.

Bed Bath & Beyond: Another stock plagued by Amazon, Bed Bath & Beyond has been buying back stock in the hopes of erasing the e-commerce giant's influence on its shares.

"Those repurchases, they've been a huge waste of money and time for management," Cramer said. "Maybe this time will be different? I think not — Bed Bath's a well-run company, but there's only so much they can do against a practically unbeatable behemoth like Amazon."

General Mills: The consumer foods giant will report earnings before the bell, and Cramer hopes to see signs of growth in its food portfolio.

"It's a been a tough run for a very well-run company and, even as it's tried to make its offerings more natural and organic, the numbers just haven't been there. But it's got a new CEO, Jeff Harmening, and he may have some answers," the "Mad Money" host said.

An analyst meeting at Rambus, a small but important semiconductor licensing company, should bring clarity on the state of some key areas of the market including data centers and the internet of things, Cramer said.

"This company's results have hammered Nike shares time and again. Maybe the guidance cut was deep enough that the stock won't get crushed when we see the real numbers. But as I said earlier this week, don't bother to bottom fish here, " the "Mad Money" host said. "It's not worth it."

Final Thoughts

As the market runs higher and higher despite an array of potentially detrimental geopolitical and economic factors, Cramer wants investors to refrain from getting too comfortable.

"I'm urging you not to get complacent," Cramer said. "There's no doubt that business is better, no doubt that it's a light week and there may not be so many catalysts that could take things down. However, that is when, historically, you need to be the most vigilant. Or another way to put it: the market never stays this easy for long."